PDF
Full
Outline
Uniaxial compressive strengths tests were carried out in the field and in the low-temperature laboratory to investigate the mechanical properties of granular sea ice, with a strain rates ranging from 10−5 s−1 to 10−2 s−1. The test temperatures were set at −3 ℃, −5 ℃, −7 ℃, −10 ℃, and −15 ℃, respectively. The loading direction was parallel to the ice surface. The test results show that the uniaxial compressive strength of sea ice increases with the strain rate in the ductile zone, decreases with the increase of the strain rate in the brittle zone, and reaches its peak in the ductile-brittle transition zone. Comparing the ice temperature-peak strength curve with historical data, it is found that the peak of compressive strength of granular sea ice in Bohai is relatively low, and increases with the decrease of ice temperature, but its upward trend gradually slows down, which reflects the influence of sea ice crystal structure on ice mechanical properties. The sea ice porosity was introduced to establish the statistical relationship between sea ice uniaxial compressive strength and strain rate, as well as porosity, across a wide strain-rate range. The feasibility of a unified mathematical description for mechanical properties of Bohai Sea ice and polar sea ice was discussed.
PDF
76
35
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
